Can't find microsoft.office.interop.outlook

[James_Yang1]

I can't reference "Microsoft.Office.Interop.Outlook". Do I have to install anything?

[Kyle_Larson3 · Accepted solution]

Sorta....If you want to run in a unity project, you have will have to copy the version of the Microsoft.Office.Interop.Outlook.dll to the c:\windows\assembly\ folder. 
Once there, add the reference to it in the system assemblies. 

[Tyler_Sorber]

Hi James

I would definitely suggest trying out Kyle's suggestion above. As long as the Interop Assembly is Strongly Typed, it should be able to be added to the GAC; otherwise, you can import it through the Import Assembly Wizard.

If you are in need of additional assistance after attempting Kyle's suggestion, I would highly recommend contacting your first line of support so that this issue can be look further into, at a more in depth level.